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<?php /** * Upgrade API: WP_Upgrader class * * Requires skin classes and WP_Upgrader subclasses for backward compatibility. * * @package WordPress * @subpackage Upgrader * @since 2.8.0 */ /** WP_Upgrader_Skin class */ require_once ABSPATH . 'wp-admin/includes/class-wp-upgrader-skin.php'; /** Plugin_Upgrader_Skin class */ require_once ABSPATH . 'wp-admin/includes/class-plugin-upgrader-skin.php'; /** Theme_Upgrader_Skin class */ require_once ABSPATH . 'wp-admin/includes/class-theme-upgrader-skin.php'; /** Bulk_Upgrader_Skin class */ require_once ABSPATH . 'wp-admin/includes/class-bulk-upgrader-skin.php'; /** Bulk_Plugin_Upgrader_Skin class */ require_once ABSPATH . 'wp-admin/includes/class-bulk-plugin-upgrader-skin.php'; /** Bulk_Theme_Upgrader_Skin class */ require_once ABSPATH . 'wp-admin/includes/class-bulk-theme-upgrader-skin.php'; /** Plugin_Installer_Skin class */ require_once ABSPATH . 'wp-admin/includes/class-plugin-installer-skin.php'; /** Theme_Installer_Skin class */ require_once ABSPATH . 'wp-admin/includes/class-theme-installer-skin.php'; /** Language_Pack_Upgrader_Skin class */ require_once ABSPATH . 'wp-admin/includes/class-language-pack-upgrader-skin.php'; /** Automatic_Upgrader_Skin class */ require_once ABSPATH . 'wp-admin/includes/class-automatic-upgrader-skin.php'; /** WP_Ajax_Upgrader_Skin class */ require_once ABSPATH . 'wp-admin/includes/class-wp-ajax-upgrader-skin.php'; /** * Core class used for upgrading/installing a local set of files via * the Filesystem Abstraction classes from a Zip file. * * @since 2.8.0 */ class WP_Upgrader { /** * The error/notification strings used to update the user on the progress. * * @since 2.8.0 * @var array $strings */ public $strings = array(); /** * The upgrader skin being used. * * @since 2.8.0 * @var Automatic_Upgrader_Skin|WP_Upgrader_Skin $skin */ public $skin = null; /** * The result of the installation. * * This is set by WP_Upgrader::install_package(), only when the package is installed * successfully. It will then be an array, unless a WP_Error is returned by the * {@see 'upgrader_post_install'} filter. In that case, the WP_Error will be assigned to * it. * * @since 2.8.0 * * @var WP_Error|array $result { * @type string $source The full path to the source the files were installed from. * @type string $source_files List of all the files in the source directory. * @type string $destination The full path to the installation destination folder. * @type string $destination_name The name of the destination folder, or empty if `$destination` * and `$local_destination` are the same. * @type string $local_destination The full local path to the destination folder. This is usually * the same as `$destination`. * @type string $remote_destination The full remote path to the destination folder * (i.e., from `$wp_filesystem`). * @type bool $clear_destination Whether the destination folder was cleared. * } */ public $result = array(); /** * The total number of updates being performed. * * Set by the bulk update methods. * * @since 3.0.0 * @var int $update_count */ public $update_count = 0; /** * The current update if multiple updates are being performed. * * Used by the bulk update methods, and incremented for each update. * * @since 3.0.0 * @var int */ public $update_current = 0; /** * Construct the upgrader with a skin. * * @since 2.8.0 * * @param WP_Upgrader_Skin $skin The upgrader skin to use. Default is a WP_Upgrader_Skin. * instance. */ public function __construct( $skin = null ) { if ( null == $skin ) $this->skin = new WP_Upgrader_Skin(); else $this->skin = $skin; } /** * Initialize the upgrader. * * This will set the relationship between the skin being used and this upgrader, * and also add the generic strings to `WP_Upgrader::$strings`. * * @since 2.8.0 */ public function init() { $this->skin->set_upgrader($this); $this->generic_strings(); } /** * Add the generic strings to WP_Upgrader::$strings. * * @since 2.8.0 */ public function generic_strings() { $this->strings['bad_request'] = __('Invalid data provided.'); $this->strings['fs_unavailable'] = __('Could not access filesystem.'); $this->strings['fs_error'] = __('Filesystem error.'); $this->strings['fs_no_root_dir'] = __('Unable to locate WordPress root directory.'); $this->strings['fs_no_content_dir'] = __('Unable to locate WordPress content directory (wp-content).'); $this->strings['fs_no_plugins_dir'] = __('Unable to locate WordPress plugin directory.'); $this->strings['fs_no_themes_dir'] = __('Unable to locate WordPress theme directory.'); /* translators: %s: directory name */ $this->strings['fs_no_folder'] = __('Unable to locate needed folder (%s).'); $this->strings['download_failed'] = __('Download failed.'); $this->strings['installing_package'] = __('Installing the latest version…'); $this->strings['no_files'] = __('The package contains no files.'); $this->strings['folder_exists'] = __('Destination folder already exists.'); $this->strings['mkdir_failed'] = __('Could not create directory.'); $this->strings['incompatible_archive'] = __('The package could not be installed.'); $this->strings['files_not_writable'] = __( 'The update cannot be installed because we will be unable to copy some files. This is usually due to inconsistent file permissions.' ); $this->strings['maintenance_start'] = __('Enabling Maintenance mode…'); $this->strings['maintenance_end'] = __('Disabling Maintenance mode…'); } /** * Connect to the filesystem. * * @since 2.8.0 * * @global WP_Filesystem_Base $wp_filesystem Subclass * * @param array $directories Optional. A list of directories. If any of these do * not exist, a WP_Error object will be returned. * Default empty array. * @param bool $allow_relaxed_file_ownership Whether to allow relaxed file ownership. * Default false. * @return bool|WP_Error True if able to connect, false or a WP_Error otherwise. */ public function fs_connect( $directories = array(), $allow_relaxed_file_ownership = false ) { global $wp_filesystem; if ( false === ( $credentials = $this->skin->request_filesystem_credentials( false, $directories[0], $allow_relaxed_file_ownership ) ) ) { return false; } if ( ! WP_Filesystem( $credentials, $directories[0], $allow_relaxed_file_ownership ) ) { $error = true; if ( is_object($wp_filesystem) && $wp_filesystem->errors->get_error_code() ) $error = $wp_filesystem->errors; // Failed to connect, Error and request again $this->skin->request_filesystem_credentials( $error, $directories[0], $allow_relaxed_file_ownership ); return false; } if ( ! is_object($wp_filesystem) ) return new WP_Error('fs_unavailable', $this->strings['fs_unavailable'] ); if ( is_wp_error($wp_filesystem->errors) && $wp_filesystem->errors->get_error_code() ) return new WP_Error('fs_error', $this->strings['fs_error'], $wp_filesystem->errors); foreach ( (array)$directories as $dir ) { switch ( $dir ) { case ABSPATH: if ( ! $wp_filesystem->abspath() ) return new WP_Error('fs_no_root_dir', $this->strings['fs_no_root_dir']); break; case WP_CONTENT_DIR: if ( ! $wp_filesystem->wp_content_dir() ) return new WP_Error('fs_no_content_dir', $this->strings['fs_no_content_dir']); break; case WP_PLUGIN_DIR: if ( ! $wp_filesystem->wp_plugins_dir() ) return new WP_Error('fs_no_plugins_dir', $this->strings['fs_no_plugins_dir']); break; case get_theme_root(): if ( ! $wp_filesystem->wp_themes_dir() ) return new WP_Error('fs_no_themes_dir', $this->strings['fs_no_themes_dir']); break; default: if ( ! $wp_filesystem->find_folder($dir) ) return new WP_Error( 'fs_no_folder', sprintf( $this->strings['fs_no_folder'], esc_html( basename( $dir ) ) ) ); break; } } return true; } //end fs_connect(); /** * Download a package. * * @since 2.8.0 * * @param string $package The URI of the package. If this is the full path to an * existing local file, it will be returned untouched. * @return string|WP_Error The full path to the downloaded package file, or a WP_Error object. */ public function download_package( $package ) { /** * Filters whether to return the package. * * @since 3.7.0 * * @param bool $reply Whether to bail without returning the package. * Default false. * @param string $package The package file name. * @param WP_Upgrader $this The WP_Upgrader instance. */ $reply = apply_filters( 'upgrader_pre_download', false, $package, $this ); if ( false !== $reply ) return $reply; if ( ! preg_match('!^(http|https|ftp)://!i', $package) && file_exists($package) ) //Local file or remote? return $package; //must be a local file.. if ( empty($package) ) return new WP_Error('no_package', $this->strings['no_package']); $this->skin->feedback('downloading_package', $package); $download_file = download_url($package); if ( is_wp_error($download_file) ) return new WP_Error('download_failed', $this->strings['download_failed'], $download_file->get_error_message()); return $download_file; } /** * Unpack a compressed package file. * * @since 2.8.0 * * @global WP_Filesystem_Base $wp_filesystem Subclass * * @param string $package Full path to the package file. * @param bool $delete_package Optional. Whether to delete the package file after attempting * to unpack it. Default true. * @return string|WP_Error The path to the unpacked contents, or a WP_Error on failure. */ public function unpack_package( $package, $delete_package = true ) { global $wp_filesystem; $this->skin->feedback('unpack_package'); $upgrade_folder = $wp_filesystem->wp_content_dir() . 'upgrade/'; //Clean up contents of upgrade directory beforehand. $upgrade_files = $wp_filesystem->dirlist($upgrade_folder); if ( !empty($upgrade_files) ) { foreach ( $upgrade_files as $file ) $wp_filesystem->delete($upgrade_folder . $file['name'], true); } // We need a working directory - Strip off any .tmp or .zip suffixes $working_dir = $upgrade_folder . basename( basename( $package, '.tmp' ), '.zip' ); // Clean up working directory if ( $wp_filesystem->is_dir($working_dir) ) $wp_filesystem->delete($working_dir, true); // Unzip package to working directory $result = unzip_file( $package, $working_dir ); // Once extracted, delete the package if required. if ( $delete_package ) unlink($package); if ( is_wp_error($result) ) { $wp_filesystem->delete($working_dir, true); if ( 'incompatible_archive' == $result->get_error_code() ) { return new WP_Error( 'incompatible_archive', $this->strings['incompatible_archive'], $result->get_error_data() ); } return $result; } return $working_dir; } /** * Flatten the results of WP_Filesystem::dirlist() for iterating over. * * @since 4.9.0 * @access protected * * @param array $nested_files Array of files as returned by WP_Filesystem::dirlist() * @param string $path Relative path to prepend to child nodes. Optional. * @return array $files A flattened array of the $nested_files specified. */ protected function flatten_dirlist( $nested_files, $path = '' ) { $files = array(); foreach ( $nested_files as $name => $details ) { $files[ $path . $name ] = $details; // Append children recursively if ( ! empty( $details['files'] ) ) { $children = $this->flatten_dirlist( $details['files'], $path . $name . '/' ); // Merge keeping possible numeric keys, which array_merge() will reindex from 0..n $files = $files + $children; } } return $files; } /** * Clears the directory where this item is going to be installed into. * * @since 4.3.0 * * @global WP_Filesystem_Base $wp_filesystem Subclass * * @param string $remote_destination The location on the remote filesystem to be cleared * @return bool|WP_Error True upon success, WP_Error on failure. */ public function clear_destination( $remote_destination ) { global $wp_filesystem; $files = $wp_filesystem->dirlist( $remote_destination, true, true ); // False indicates that the $remote_destination doesn't exist. if ( false === $files ) { return true; } // Flatten the file list to iterate over $files = $this->flatten_dirlist( $files ); // Check all files are writable before attempting to clear the destination. $unwritable_files = array(); // Check writability. foreach ( $files as $filename => $file_details ) { if ( ! $wp_filesystem->is_writable( $remote_destination . $filename ) ) { // Attempt to alter permissions to allow writes and try again. $wp_filesystem->chmod( $remote_destination . $filename, ( 'd' == $file_details['type'] ? FS_CHMOD_DIR : FS_CHMOD_FILE ) ); if ( ! $wp_filesystem->is_writable( $remote_destination . $filename ) ) { $unwritable_files[] = $filename; } } } if ( ! empty( $unwritable_files ) ) { return new WP_Error( 'files_not_writable', $this->strings['files_not_writable'], implode( ', ', $unwritable_files ) ); } if ( ! $wp_filesystem->delete( $remote_destination, true ) ) { return new WP_Error( 'remove_old_failed', $this->strings['remove_old_failed'] ); } return true; } /** * Install a package. * * Copies the contents of a package form a source directory, and installs them in * a destination directory. Optionally removes the source. It can also optionally * clear out the destination folder if it already exists. * * @since 2.8.0 * * @global WP_Filesystem_Base $wp_filesystem Subclass * @global array $wp_theme_directories * * @param array|string $args { * Optional. Array or string of arguments for installing a package. Default empty array. * * @type string $source Required path to the package source. Default empty. * @type string $destination Required path to a folder to install the package in. * Default empty. * @type bool $clear_destination Whether to delete any files already in the destination * folder. Default false. * @type bool $clear_working Whether to delete the files form the working directory * after copying to the destination. Default false. * @type bool $abort_if_destination_exists Whether to abort the installation if * the destination folder already exists. Default true. * @type array $hook_extra Extra arguments to pass to the filter hooks called by * WP_Upgrader::install_package(). Default empty array. * } * * @return array|WP_Error The result (also stored in `WP_Upgrader::$result`), or a WP_Error on failure. */ public function install_package( $args = array() ) { global $wp_filesystem, $wp_theme_directories; $defaults = array( 'source' => '', // Please always pass this 'destination' => '', // and this 'clear_destination' => false, 'clear_working' => false, 'abort_if_destination_exists' => true, 'hook_extra' => array() ); $args = wp_parse_args($args, $defaults); // These were previously extract()'d. $source = $args['source']; $destination = $args['destination']; $clear_destination = $args['clear_destination']; @set_time_limit( 300 ); if ( empty( $source ) || empty( $destination ) ) { return new WP_Error( 'bad_request', $this->strings['bad_request'] ); } $this->skin->feedback( 'installing_package' ); /** * Filters the install response before the installation has started. * * Returning a truthy value, or one that could be evaluated as a WP_Error * will effectively short-circuit the installation, returning that value * instead. * * @since 2.8.0 * * @param bool|WP_Error $response Response. * @param array $hook_extra Extra arguments passed to hooked filters. */ $res = apply_filters( 'upgrader_pre_install', true, $args['hook_extra'] ); if ( is_wp_error( $res ) ) { return $res; } //Retain the Original source and destinations $remote_source = $args['source']; $local_destination = $destination; $source_files = array_keys( $wp_filesystem->dirlist( $remote_source ) ); $remote_destination = $wp_filesystem->find_folder( $local_destination ); //Locate which directory to copy to the new folder, This is based on the actual folder holding the files. if ( 1 == count( $source_files ) && $wp_filesystem->is_dir( trailingslashit( $args['source'] ) . $source_files[0] . '/' ) ) { //Only one folder? Then we want its contents. $source = trailingslashit( $args['source'] ) . trailingslashit( $source_files[0] ); } elseif ( count( $source_files ) == 0 ) { return new WP_Error( 'incompatible_archive_empty', $this->strings['incompatible_archive'], $this->strings['no_files'] ); // There are no files? } else { // It's only a single file, the upgrader will use the folder name of this file as the destination folder. Folder name is based on zip filename. $source = trailingslashit( $args['source'] ); } /** * Filters the source file location for the upgrade package. * * @since 2.8.0 * @since 4.4.0 The $hook_extra parameter became available. * * @param string $source File source location. * @param string $remote_source Remote file source location. * @param WP_Upgrader $this WP_Upgrader instance. * @param array $hook_extra Extra arguments passed to hooked filters. */ $source = apply_filters( 'upgrader_source_selection', $source, $remote_source, $this, $args['hook_extra'] ); if ( is_wp_error( $source ) ) { return $source; } // Has the source location changed? If so, we need a new source_files list. if ( $source !== $remote_source ) { $source_files = array_keys( $wp_filesystem->dirlist( $source ) ); } /* * Protection against deleting files in any important base directories. * Theme_Upgrader & Plugin_Upgrader also trigger this, as they pass the * destination directory (WP_PLUGIN_DIR / wp-content/themes) intending * to copy the directory into the directory, whilst they pass the source * as the actual files to copy. */ $protected_directories = array( ABSPATH, WP_CONTENT_DIR, WP_PLUGIN_DIR, WP_CONTENT_DIR . '/themes' ); if ( is_array( $wp_theme_directories ) ) { $protected_directories = array_merge( $protected_directories, $wp_theme_directories ); } if ( in_array( $destination, $protected_directories ) ) { $remote_destination = trailingslashit( $remote_destination ) . trailingslashit( basename( $source ) ); $destination = trailingslashit( $destination ) . trailingslashit( basename( $source ) ); } if ( $clear_destination ) { // We're going to clear the destination if there's something there. $this->skin->feedback('remove_old'); $removed = $this->clear_destination( $remote_destination ); /** * Filters whether the upgrader cleared the destination. * * @since 2.8.0 * * @param mixed $removed Whether the destination was cleared. true on success, WP_Error on failure * @param string $local_destination The local package destination. * @param string $remote_destination The remote package destination. * @param array $hook_extra Extra arguments passed to hooked filters. */ $removed = apply_filters( 'upgrader_clear_destination', $removed, $local_destination, $remote_destination, $args['hook_extra'] ); if ( is_wp_error( $removed ) ) { return $removed; } } elseif ( $args['abort_if_destination_exists'] && $wp_filesystem->exists($remote_destination) ) { //If we're not clearing the destination folder and something exists there already, Bail. //But first check to see if there are actually any files in the folder. $_files = $wp_filesystem->dirlist($remote_destination); if ( ! empty($_files) ) { $wp_filesystem->delete($remote_source, true); //Clear out the source files. return new WP_Error('folder_exists', $this->strings['folder_exists'], $remote_destination ); } } //Create destination if needed if ( ! $wp_filesystem->exists( $remote_destination ) ) { if ( ! $wp_filesystem->mkdir( $remote_destination, FS_CHMOD_DIR ) ) { return new WP_Error( 'mkdir_failed_destination', $this->strings['mkdir_failed'], $remote_destination ); } } // Copy new version of item into place. $result = copy_dir($source, $remote_destination); if ( is_wp_error($result) ) { if ( $args['clear_working'] ) { $wp_filesystem->delete( $remote_source, true ); } return $result; } //Clear the Working folder? if ( $args['clear_working'] ) { $wp_filesystem->delete( $remote_source, true ); } $destination_name = basename( str_replace($local_destination, '', $destination) ); if ( '.' == $destination_name ) { $destination_name = ''; } $this->result = compact( 'source', 'source_files', 'destination', 'destination_name', 'local_destination', 'remote_destination', 'clear_destination' ); /** * Filters the installation response after the installation has finished. * * @since 2.8.0 * * @param bool $response Installation response. * @param array $hook_extra Extra arguments passed to hooked filters. * @param array $result Installation result data. */ $res = apply_filters( 'upgrader_post_install', true, $args['hook_extra'], $this->result ); if ( is_wp_error($res) ) { $this->result = $res; return $res; } //Bombard the calling function will all the info which we've just used. return $this->result; } /** * Run an upgrade/installation. * * Attempts to download the package (if it is not a local file), unpack it, and * install it in the destination folder. * * @since 2.8.0 * * @param array $options { * Array or string of arguments for upgrading/installing a package. * * @type string $package The full path or URI of the package to install. * Default empty. * @type string $destination The full path to the destination folder. * Default empty. * @type bool $clear_destination Whether to delete any files already in the * destination folder. Default false. * @type bool $clear_working Whether to delete the files form the working * directory after copying to the destination. * Default false. * @type bool $abort_if_destination_exists Whether to abort the installation if the destination * folder already exists. When true, `$clear_destination` * should be false. Default true. * @type bool $is_multi Whether this run is one of multiple upgrade/installation * actions being performed in bulk. When true, the skin * WP_Upgrader::header() and WP_Upgrader::footer() * aren't called. Default false. * @type array $hook_extra Extra arguments to pass to the filter hooks called by * WP_Upgrader::run(). * } * @return array|false|WP_error The result from self::install_package() on success, otherwise a WP_Error, * or false if unable to connect to the filesystem. */ public function run( $options ) { $defaults = array( 'package' => '', // Please always pass this. 'destination' => '', // And this 'clear_destination' => false, 'abort_if_destination_exists' => true, // Abort if the Destination directory exists, Pass clear_destination as false please 'clear_working' => true, 'is_multi' => false, 'hook_extra' => array() // Pass any extra $hook_extra args here, this will be passed to any hooked filters. ); $options = wp_parse_args( $options, $defaults ); /** * Filters the package options before running an update. * * See also {@see 'upgrader_process_complete'}. * * @since 4.3.0 * * @param array $options { * Options used by the upgrader. * * @type string $package Package for update. * @type string $destination Update location. * @type bool $clear_destination Clear the destination resource. * @type bool $clear_working Clear the working resource. * @type bool $abort_if_destination_exists Abort if the Destination directory exists. * @type bool $is_multi Whether the upgrader is running multiple times. * @type array $hook_extra { * Extra hook arguments. * * @type string $action Type of action. Default 'update'. * @type string $type Type of update process. Accepts 'plugin', 'theme', or 'core'. * @type bool $bulk Whether the update process is a bulk update. Default true. * @type string $plugin The base plugin path from the plugins directory. * @type string $theme The stylesheet or template name of the theme. * @type string $language_update_type The language pack update type. Accepts 'plugin', 'theme', * or 'core'. * @type object $language_update The language pack update offer. * } * } */ $options = apply_filters( 'upgrader_package_options', $options ); if ( ! $options['is_multi'] ) { // call $this->header separately if running multiple times $this->skin->header(); } // Connect to the Filesystem first. $res = $this->fs_connect( array( WP_CONTENT_DIR, $options['destination'] ) ); // Mainly for non-connected filesystem. if ( ! $res ) { if ( ! $options['is_multi'] ) { $this->skin->footer(); } return false; } $this->skin->before(); if ( is_wp_error($res) ) { $this->skin->error($res); $this->skin->after(); if ( ! $options['is_multi'] ) { $this->skin->footer(); } return $res; } /* * Download the package (Note, This just returns the filename * of the file if the package is a local file) */ $download = $this->download_package( $options['package'] ); if ( is_wp_error($download) ) { $this->skin->error($download); $this->skin->after(); if ( ! $options['is_multi'] ) { $this->skin->footer(); } return $download; } $delete_package = ( $download != $options['package'] ); // Do not delete a "local" file // Unzips the file into a temporary directory. $working_dir = $this->unpack_package( $download, $delete_package ); if ( is_wp_error($working_dir) ) { $this->skin->error($working_dir); $this->skin->after(); if ( ! $options['is_multi'] ) { $this->skin->footer(); } return $working_dir; } // With the given options, this installs it to the destination directory. $result = $this->install_package( array( 'source' => $working_dir, 'destination' => $options['destination'], 'clear_destination' => $options['clear_destination'], 'abort_if_destination_exists' => $options['abort_if_destination_exists'], 'clear_working' => $options['clear_working'], 'hook_extra' => $options['hook_extra'] ) ); $this->skin->set_result($result); if ( is_wp_error($result) ) { $this->skin->error($result); $this->skin->feedback('process_failed'); } else { // Installation succeeded. $this->skin->feedback('process_success'); } $this->skin->after(); if ( ! $options['is_multi'] ) { /** * Fires when the upgrader process is complete. * * See also {@see 'upgrader_package_options'}. * * @since 3.6.0 * @since 3.7.0 Added to WP_Upgrader::run(). * @since 4.6.0 `$translations` was added as a possible argument to `$hook_extra`. * * @param WP_Upgrader $this WP_Upgrader instance. In other contexts, $this, might be a * Theme_Upgrader, Plugin_Upgrader, Core_Upgrade, or Language_Pack_Upgrader instance. * @param array $hook_extra { * Array of bulk item update data. * * @type string $action Type of action. Default 'update'. * @type string $type Type of update process. Accepts 'plugin', 'theme', 'translation', or 'core'. * @type bool $bulk Whether the update process is a bulk update. Default true. * @type array $plugins Array of the basename paths of the plugins' main files. * @type array $themes The theme slugs. * @type array $translations { * Array of translations update data. * * @type string $language The locale the translation is for. * @type string $type Type of translation. Accepts 'plugin', 'theme', or 'core'. * @type string $slug Text domain the translation is for. The slug of a theme/plugin or * 'default' for core translations. * @type string $version The version of a theme, plugin, or core. * } * } */ do_action( 'upgrader_process_complete', $this, $options['hook_extra'] ); $this->skin->footer(); } return $result; } /** * Toggle maintenance mode for the site. * * Creates/deletes the maintenance file to enable/disable maintenance mode. * * @since 2.8.0 * * @global WP_Filesystem_Base $wp_filesystem Subclass * * @param bool $enable True to enable maintenance mode, false to disable. */ public function maintenance_mode( $enable = false ) { global $wp_filesystem; $file = $wp_filesystem->abspath() . '.maintenance'; if ( $enable ) { $this->skin->feedback('maintenance_start'); // Create maintenance file to signal that we are upgrading $maintenance_string = '<?php $upgrading = ' . time() . '; ?>'; $wp_filesystem->delete($file); $wp_filesystem->put_contents($file, $maintenance_string, FS_CHMOD_FILE); } elseif ( ! $enable && $wp_filesystem->exists( $file ) ) { $this->skin->feedback('maintenance_end'); $wp_filesystem->delete($file); } } /** * Creates a lock using WordPress options. * * @since 4.5.0 * @static * * @param string $lock_name The name of this unique lock. * @param int $release_timeout Optional. The duration in seconds to respect an existing lock. * Default: 1 hour. * @return bool False if a lock couldn't be created or if the lock is still valid. True otherwise. */ public static function create_lock( $lock_name, $release_timeout = null ) { global $wpdb; if ( ! $release_timeout ) { $release_timeout = HOUR_IN_SECONDS; } $lock_option = $lock_name . '.lock'; // Try to lock. $lock_result = $wpdb->query( $wpdb->prepare( "INSERT IGNORE INTO `$wpdb->options` ( `option_name`, `option_value`, `autoload` ) VALUES (%s, %s, 'no') /* LOCK */", $lock_option, time() ) ); if ( ! $lock_result ) { $lock_result = get_option( $lock_option ); // If a lock couldn't be created, and there isn't a lock, bail. if ( ! $lock_result ) { return false; } // Check to see if the lock is still valid. If it is, bail. if ( $lock_result > ( time() - $release_timeout ) ) { return false; } // There must exist an expired lock, clear it and re-gain it. WP_Upgrader::release_lock( $lock_name ); return WP_Upgrader::create_lock( $lock_name, $release_timeout ); } // Update the lock, as by this point we've definitely got a lock, just need to fire the actions. update_option( $lock_option, time() ); return true; } /** * Releases an upgrader lock. * * @since 4.5.0 * @static * * @see WP_Upgrader::create_lock() * * @param string $lock_name The name of this unique lock. * @return bool True if the lock was successfully released. False on failure. */ public static function release_lock( $lock_name ) { return delete_option( $lock_name . '.lock' ); } } /** Plugin_Upgrader class */ require_once ABSPATH . 'wp-admin/includes/class-plugin-upgrader.php'; /** Theme_Upgrader class */ require_once ABSPATH . 'wp-admin/includes/class-theme-upgrader.php'; /** Language_Pack_Upgrader class */ require_once ABSPATH . 'wp-admin/includes/class-language-pack-upgrader.php'; /** Core_Upgrader class */ require_once ABSPATH . 'wp-admin/includes/class-core-upgrader.php'; /** File_Upload_Upgrader class */ require_once ABSPATH . 'wp-admin/includes/class-file-upload-upgrader.php'; /** WP_Automatic_Updater class */ require_once ABSPATH . 'wp-admin/includes/class-wp-automatic-updater.php'; 
